Heney b



(N0 Model.)

H. E. WAITE & s.H. BARTLETT.

MAGNETO TE'LBPHONE.

N0. 316,205. Patented Apr. 2 1, 18851 UNITEDI STATES PATENT @FFICE.

HENRY E. WAIT E AND SAMUEL H. BARTLETT, OF NEW YORK, N. Y.

MAGNETO-TELEPHONE.

SPECIFICATION forming part of Letters Patent N0. 316,205, dated April 21 1885. Applieation filecl August 28, 1884. (N model.)

' T0 all whom it may cozwern:

Be it; known that we HENRY E. WAITE and SAMUEL H. BARILETT, citizens of the United Sbzi.tes residing in the eity, county, and Stehe of New York, have invented cerbain new and nseful Improvements in Magneto Telephones, 0f which the following is a specification.

0111 invention relates tomagneto-telephones; and lt consiss in certain improvements in the consuruction thereof, as more particularly pointed out hereinafber.

In the drawings, Figure l is a perspecbive view of an ordinary box ttalephone-transmitter and our reeeiver hanging bherefrom. Fig. 2 is aplan view of the telephone-reeeiver witah the handle removed; and Fig. 3 is a sectional view, the parts 0f the ease being separated.

Heretofore it has been eommon to atlaach the connecting condueting-cord to bindingposts on the transmitter and reeeiver. Ve have arranged the terminals 0f the eonducting-cord so that they will pass direeblythrough holes in the transrnitter-box ancl be suitably secured t0 be circuit-wires, and the other terminals will enter holes in the reoeiver ease and b0x conneeted t0 th e terminals of the magnet-coil.

The ende of the wir'es, b0th 0f theconductor A and coil B, are easily and firmly secured between the metal plates 01 buttons a b by suitable screws, ELI1C]. in Order t0 prevent; the strain 0f the weight of he telephone from pulling the ends out fron1 between the plates 0r disks we provide awasher 01 plate, Gwhieh is adjusted 1:0 bear against the covered ends of the conductor and bieor clamp them in the holes in the case, am]. an eye-serew, D, is passed through the case and serves t0 hold the plate O in position. By this means a very secure fastening is provided for the terminals of ehe conductor, and the weight of thefelephone will be supported upon the covered ends of the eonductor, instead 0f the naked wire in he connecting buttons or plates. In sorne instances we attaeh a cord, E, t0 the eyescrew t0 relieve the eonductor 0f the weight 0f the telephone, t-he other end being connected the transmibter-case 0x obher place.

In this receiver the ease is macle of three sections-bhe body porbion F, eontaining the operative parts 0f the telephone, a detaehable The magnet I1's preferably runde in the forn1 b shown-that is, semieircularwibh a re-entering end t0 which is seoured a sofb-iron core, J, having a eoil, B. Ihe magnetis supported. upon a shoulder, f 0f the body F. Also supported i1pon the shoulder f 1's a spring-arm, K, bent in themanner shown. and adapted t0 bea1 upon the diaphragm L. If be diaphragxn is of magnebic material the spring need n0b necessarily be so, as it simply serves to strain the diaphragnn; but we prefer so make Ehe diaphragm 0f wood, cork, card-board,or obher non-magnetic material, and make the spring 0f magnetie material. An adj usting-screw, k, is provided, which passes through the spring als the elevated portion and into the material 0f die ease.

By this arrangement all the parts.are very having holes, 0f a conductingpord Ehe terminals 0f which pass bhrough the ease, a elamp er plate adapted t0 bite 0r press the ends 0f the conduetor againsb the sides 0f the holes, and a sorew for holding seid elamp, substantially es deseribed.

2. The combination, with the telephonecase, 0f a magnet supported upon a shouldef in the body parl; and carrying a c0il or helix conneeted 130 1ine, 2LI1(1 a spring-arm 0f magnetie material, also secured '00 the shoulder and benb so as to bear against the diaphragm,

and an adjusting-screw, substantially es de- 9 scribed.

In test-imony whereof we have signed 0111 names o0 this speeification in tl1e presence 0f two subseribing witnesses.

HENRY E. WAITE. SAMUEL H. BARTLETT. Witnesses:

WM. H. WOODHULL, C. SPARMAN. 

